Combined electrical motor and generator



Aug. 14, 1934-. I H 5 DE MALAUSSENE 1,970,498

COMBINED ELECTRICAL MOTOR AND GENERATOR Filed June 5, l93l .3 Sheets-Sheet l IN VEN TOR.

' l5. deMALAUSSENE 1934- H. 5. DE MALAUSSENE 1,970,498

COMBINED ELECTRICAL MOTOR AND GENERATOR Filed June 5, 1931 3 Sheets-Sheet 2 INVENTOR. HENRI deMALAl/SSENE ATT NEYS.

SSSSSSSSSSSSSS NE i atented Aug. 14, 1934 arse STATES LtitAtS PAT COMBINED ELECTRICAL MOTOR AND GENERATOR Calif.

Application June 5, 1931, Serial No. 542,420

3 Claims.

This invention. relates to an electrical machine and more particularly a combined motor generator unit having a direct current motor armature winding, 2, direct current generator armature winding, and an alternating current armature winding wound on a common armature.

The use of alternating current has many advantages over direct current and the supply of alternating current on farms, in camps or the like is in many cases unavailable, and it is one or" the objects of this invention to provide a combined direct current motor, direct current generator, and alternating current generator assembled in one unit which is adapted to be supplied with power from a storage battery, to supply direct current for recharging the battery or for any other use, and to provide an alternating current supply to a load from the alternating current winding.

Another object of the invention is to provide an electrical machine of this character which utilizes a common armature on which all three of the windings are wound.

Another object of the invention is to arrange and connect the field windings of the unit in such amanner that they cooperate with the respective windings on the common armature to provide a field common to all of the armature windings.

Another object of the invention is to construct the unit in such a manner that each of the individual parts which necessarily require adjustment from time to time are readily accessible and independent of one another.

A still further object of the invention is to provide a combined machine or" the class described which is efficient, cheap to manufacture and compact.

Other objects including simplicity and durability will become apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same:

Figure l is a front elevational view partly in section,

Figure 2 is a side elevational View partly in section taken on line A-A of Figure 1,

Figure 3 is a diagrammatical view illustrating the electrical connections of the machine, and

Figure 4 is a view showing the poles arranged in staggered relationship.

In the drawings wherein for the purpose of illustration is shown a preferred embodiment of the invention, or support on the field poles the numeral 2 which fixed a y 6 between which t gnates a space oke l carrying he err-nature 8 revolves. opposin" poles in the field are staggered instead of being arranged directly opposite thereby utilising the moment or inertia which would have taken place if the poles had been directly opposite. The field are arranged 90 degrees apart and are provided th pole faces 1e. It is to be understood, however,

invention is not limited to this particular number poles inasmuch as it is believed obvious to any one skilled in the art that any number of poles may be used.

A shaft 12 is mounted n suitable bearings 14 carries an armature whi h is disposed between the opposed pole races of the poles 6. The armature is provided with three independent sets of armature windings, direct current generator armature winding 16, direct current motor armature winding 18 and alternating current armature winding 20 whi h are separated by suitable insulating material 2.2 and 24.

The direct current generator armature ing 16 is connected to the commutator 34 di posed on shaft 12, and the direct current motor armature winding 18 is connected to the motor commutator 42 also on shaft 12. Slip rings 26 and 28 fixed to shaft 12 are connected to the alternating current generator winding 20. The slip rings are provided with brush holders 39 cents. brushes 32 for supplying alternating cuat to a load or the like. The direct current motor armature is provided with a plurality of brushes .2 use in brush hold ers i4 to an adjustable ring 38 which adjustahly secured to the yoke l by means of a colt 4c. The direct current generator commutator is likewise provided with a plurality of brushes 42 mounted in brush holders 44 which are disposed on a similar 4:6 arranged on a ring adjustable with respect to the yoke in the same manner as the adjustabl ring of the direct current motor brush holder. The yokes 4 to which the field poles are are secured together by mem ers 48 and 5t) disposed on the upper and lower portions of the machine. The pole pieces 6 to the machine by screw dreaded 52 and ture 8 is of the laminated type and is keyed to the shaft 12 by means of key 52. It is to be understood, however, that the invention is not limited to the particular structure of the armature since it may within the scope of the invention be constructed in accordance with any of the well known armature designs.

Referring now more particularly to Figure 3 which illustrates the electrical connections of the combined machine, each of the field poles are provided with series windings 54 having one of the terminals connected to one of the brushes 42 of the direct current motor commutator, and the other terminal providing one of thetdirect current terminals of the machine. Thereisalso provided on each of the poles a shunt field motor winding 56 which is connected across the brushes 42 of the direct current motor commutator through a variable resistance 58, the variable resistance providing means for varying the speed of the machine. The direct current generator is also provided with shunt field windings 6O wound on each of the pole pieces and connected to brushes 34 of the direct current commutator through conductors 62 and 64.

As clearly indicated in the drawings the series field windings for the direct current motor and the direct current generator are energized from the motor brush leads. The fields are so wound that the windings compensate for voltage variation. The direct current motor windings are supplied with power from a direct current source such as a battery or the like through conductors 6B and 70. The direct current supply is taken from conductors '72 and 74 which are connected to the brushes of the direct current commutator and the alternating current supply is obtained from conductors 78 connected to slip rings 26 and 28 through brushes 32.

It will be seen that I have provided a combined direct current motor, direct current generator, and alternating current generator in a single unit which may be utilized in obtaining an alternating current electrical supply from a direct current source of any character.

For example, the direct current motor may be wound to operate at 30 volts and the direct current generator to supply a voltage of 32 volts whereas the alternating current windings may be wound to supply voltages of 115 volts, thereby making it possible to operate the direct current afications and changes without departing from the spirit and scope of the invention, and it is intended therefore, that only such limitations shall be imposed thereon as are indicated in the prior art or in the appended claims.

What I claim is:

1. In an electrical machine, a rotatable armature, a direct current motor armature winding, a direct current generator armature winding and an aiternating current armature winding on said armature, a pair of commutators for said direct current windings, slip rings for said alternating current winding, a plurality of groups of poles on each side of said armature, the groups of poles on one side of the armature being staggered in relation to the group of poles on the other side, and shunt and series field windings for each of said direct current armature windings on said field poles.

2. In an electrical machine, a rotatable disc armature, a direct current motor winding, a direct current generator winding, and an alternating current armature Winding on said armature, a commutator for each of said direct current armature windings, slip rings for said alternating current winding, field poles on each side of said armature, the poles on one side of the armature being staggered in relation to the poles on the other side, and having windings thereon for producing a magnetic field.

3. In an electrical machine, a rotatable armature, a direct current motor armature winding, a direct current generator armature winding and an alternating current armature winding on said armature, a pair of commutators for said direct current windings, slip rings for said alternating current windings, pofes on each side of said armature, the poles on one side of the armature being staggered inrelation to the poles on the other side thereof, and said poles being provided with windings for producing a magnetic field.

HENRI S. or: MALAUSSENE. 

